Diacrylic acid ester derivatives of hydantoin compounds

ABSTRACT

The disclosure covers diacrylic acid ester of the formula:   WHEREIN R1, R1&#39;&#39;, R3 and R3&#39;&#39; are hydrogen or methyl, R2 and R2&#39;&#39; are hydrogen or phenyl, or R2 and R3 or R2&#39;&#39; and R3&#39;&#39; form a trimethylene or tetramethylene group; m and n are 1 to 30 and A is an organic radical containing at least once the grouping:   WHEREIN Z represents a bivalent radical necessary for the completion of a five- or six-membered, unsubstituted or substituted, heterocyclic ring. The compounds are obtained by a process in which oxalkylated N, N-heterocycles containing once or twice the heterocyclic ring are esterified with acrylic acid and/or methacrylic acid, or transesterified with acrylic acid ester and/or methacrylic acid ester. The new diacrylates are low-viscous liquids, which can be easily processed by virtue of their consistency; and the polymerisates produced therefrom, are distinguished by good flexural strength and high transparency.

Sttes aterlt 1191 Habermeier et al.

[ Dec. 3, 1974 DIACRY-LIC ACID ESTER DERIVATIVES OF HYDANTOIN COMPOUNDS [75] Inventors; Juergen Habermeier, Pfeffingen,

Basel-Land; Daniel Porret, Binningen, both of Switzerland [73] Assignee: Ciba-Geigy Corporation, Ardsley,

[22] Filed: Apr. 5, 1972 [2]] Appl. No.: 241,386

[52] US. Cl 260/30'95, 260/37 N, 260/88.3 R, v 260/88.7 R, 260/89.l, 260/79.5 N, 260/93.5

1511 Int. Cl 00711 49/32 [58] Field of Search 260/309.5

[56] References Cited UNITED STATES PATENTS 2,972,618 2 1961 Bortnick 260/309.5 3,213,104 10/1965 Cashin et al. 260/309.5 3,629,263 12/1971 BHIZEX 6161 260 309.s 3,676,454 7/1972 Vida 260/309.5 3,726,895 4/1973 l-Iabermeier et a], 260/309.5

FOREIGN PATENTS OR APPLICATIONS 1,812,003 6/1970 Germany 260/3095 ,994,503 6/1970 Germany 1 1 260/309.5 3,819,986 9/1963 Japan 260/309.5 3,819,987 9/1963 Japan 260/309.5

. Primary Examiner-Natalie Trousoe m le;

[57] ABSTRACT The disclosure covers diacrylic acid ester of the forwherein R R R and R are hydrogen or methyl, R and R are hydrogen or phenyl, or R and R or R and R form a trimethylene or tetramethylene group; m and n are I to 30 and A is an organic radical containing at least once the grouping! wherein Z represents a bivalent radical necessary for 1 the completion of a fiveor six-membered, unsubstituted or substituted, heterocyclic ring;

, The compounds are obtained by a process in which The new diacrylates are low-viscous liquids, which can be easily processed by virtue of their consistency; and

the polymerisates produced therefrom, are distinguished by good flexural strength and high transparency.

6 Claims, No Drawings DIACIRYLIC ACID ESTER DERIVATIVES OF HYDANTOIN COMPOUNDS The present invention relates to new diacrylic acid esters of the general formula:

' wherein R R R and R each independently stand wherein Z represents a bivalent radical necessary for the completion of a fiveor six-membered, unsubstituted or substituted, heterocyclic ring.

The radical Z in the N-heterocyclic grouping of formula I preferably contains only carbon and hydrogen atoms, or carbon, hydrogen and oxygen atoms. It can,

for example, be a radical of the formulae:

wherein R, R", R, and R"' can each independently represent a hydrogen atom or, e.g., an alkyl radical, preferably a lower alkyl radical having one to four carbon atoms, an alkenyl radical, preferably a lower alkenyl radical having one to four carbon atoms, a cycloalkyl radical, or an optionally substituted phenyl radical.

The new diacrylic acid esters of formula I can be produced by a process in which dihydroxy compounds of the general formula wherein R R R R m, n and A have the same meanings as in formula I are esterified, in a manner known per se, with acrylic acid and/or methacrylic acid; or transesterified. in a manner known per se. with acrylic acid ester and/or methacrylic acid ester.

With the direct esterification of dihydroxy compounds of formula II with acrylic acid and/or methacrylic acid, the reactants are preferably condensed in approximately stoichiometric amounts with the use of an inert azeotropiser. These reactions are usually catalysed with acid. In the processing of the reaction solutions they are washed until free from acid, concentrated by evaporation, provided with stabilisers, and then dried in vacuo to constant weight.

With regard to the transesterification of dihydroxy compounds of formula II with acrylic acid esters and/or methacrylic. acid esters, it is preferable to use acrylic acid esters or methacrylic acid esters of lower aliphatic alcohols, and preferably in a stoichiometric excess. The transesterification reactions are catalysed with acids. The lower aliphatic alcohol forming during this reaction is continuously distilled off from the mixture. The excess monoacrylic acid ester or monomethacrylic acid ester is likewise removed by distillation from the reaction mixture. The crude product is then dissolved in an organic inert solvent, e.g., in benzene, and processed according to the procedure for the reaction solutions obtained by esterification.

The dihydroxy compounds of formula II are known compounds and can be produced by the addition to the NH-groups of N-heterocyclic compounds containing at least once the grouping:

wherein Zrepresents a bivalent radical which is necessary for the completion of a fiveor six-membered, unsubstituted or substituted heterocyclic ring, of alkene oxides of the formulae:

O (IIIb) wherein R and IR, orR ahdliQhave the same meaning as in formula I, in the presence of a suitable catalyst. The following are mentioned as suitable representative alkene oxides: ethene oxide, propene oxide, nbutene oxide, 1,2-cyclopentene oxide or 1,2-

cyclohexene oxide, styrene oxide and glycidol alkyl wherein R R R R m and it have the sar'ne meanings as in formula I, and A represents anorganic radical containing once the grouping:

wherein Z represents a bivalent radical which is necessary for the completion of a fiveor six-membered, unsubstituted or substituted heterocyclic ring.

A preferred subclass of mononuclear N-heterocyclic dihydroxy compounds of formula IV corresponds to the formula:

wherein R R R R m and n have the same meanings as in formula IV, and wherein R and R each represent a hydrogen atom or a lower alkyl radical having one to four carbon atoms, or wherein R and R to gether represent a trimethylene or tetramethylene radical; representative of this class of compounds are, e.g.:

hydroxy-B-phenylethyl)-5,5-dimethylhydantoin, 1,3- di-(,B-hydroXy-B-phenylethoxy-B-phenylethoxy-B- phenylethyl)-5,5-dimethylhydantoin and 1,3-di-(B- hydroxy-B-phenylethyl)-5-isopropylhydantoin.

A further subclass of mononuclear N-heterocyclic dihydroxy compounds according to formula IV corresponds to the formula:

wherein R R R R m and n have the same meanings as in formula IV, and wherein R and R each independently represent a hydrogen atom or a lower alkyl radical having one to four carbon atoms; representative of this class of compounds are, e.g.: 1,3-di-(B-hydroxy-n-propyl )-5-methyluracil, l,3-B- hydroxy-n-butyl)-uracil and 1,3-di-(B-hydroxy-B- phenylethyl)-6-methyluracil.

A further preferred subclass of mononuclear N- heterocyclic dihydroxy compounds of formula IV correspond to the general formula:

0 (VII) wherein R R R R m and n have the same meanings as in formula IV, and wherein R and R each represent a hydrogen atom or identical or different alkyl radicals, preferably alkyl radicals having one to four carbon atoms; and R and R 'each independently represent a hydrogen atom or a preferably lower alkyl radical having one to four carbon atoms.

Representative of this class of compounds are, e.g., 1,3-di-(B-hydroxyethyl )-5,5-dimethyl-6-isopropyl-5,6- dihydrouracil, l,3-di-(B-hydroxy-n-propyl )-5,5- dimethyl-6-isopropyl-5,6-dihydrouracil, l,3-di-(B hydroxycyclohexyl)-5,5-dimethyl-5,6-dihydrouracil and l,3-di-(B-hydroxy-B-phenylethyl)-5,5-dimethyl-6- isopropyl-S,6-dihydrouracil.

A further preferred subclass of mononuclear N- heterocyclic dihydroxy compounds of formula IV corresponds to the general formula:

0 (VIII) wherein R R R R m and n have the same meanings as in formula IV, and wherein R and R each independently represent a hydrogen atom, an alkyl radical, an alkenyl radical, a cycloalkyl or -alkenyl radical, or an unsubstituted or substituted phenyl radical. The following are mentioned as being representative of this class of compounds: l,3-di-(Bhydroxethyl)5-phenyl-5-ethylbarbituric acid, l,3-di-(Bhydroxy-n-propyl )-5,5-diethylbarbituric acid, l,3-di-(B-hydroxycyclohexyl)-5,5-dimethylbarbituric acid and l,3-di-(B-hydroxy-B-phenylethyl)-5- ethyl-S-phenylbarbituric acid.

Furthermore, reference is made to the corresponding dihydroxy compounds of parabanic acid.

The binuclear dihydroxy compounds according to formula II used for the production of the new diacrylic acid esters of formula I correspond to the general formula:

wherein R R R3, R m and n have the same meanings as in formula IX, and wherein R R R and R wherein R R R R m and n have thesame meaneach represent a hydrogen atom or a lower alkyl radical having one to four carbon atoms, or wherein R and R or R and R together represent a trimethylene or tetramethylene radical. Representative compounds of this class are, e.g.: l,l-methylene-bis-[3-B-hydroxyethyl)- 5 ,S-dimethylhydantoin 1,1 -methylene-bis-[3-(B- hydroxyethoxyethoxyethyl)-5,5-dimethylhydantoin], l,l '-methylene-bis-[3-(B-hydroxy-n-propyl)-5,5- dimethylhydantoin], 1,1 -methylene-bis-[3-(B- hydroxy-n-propyl )-5-isopropylhydantoin], I ,l methylene-bis-[3-(,B-hydroxy-n-butyl)-5,5- dimethylhydantoin], 1,] -methylene-bis-[3-(B* hydroxy-B-phenylethyl)-5,5-dimethylhydantoin 1,1 methylene-bis-[3-(B-hydroxy-B-phenylethyl)-5,5- isopropylhydantoin] and 1,1 '-methylenebis-[ 3-(B- hydroxycyclohexyl )-5 ,S-dimethylhydantoin A further preferred subclass of binuclear dihydroxy compounds of formula IX corresponds to the general formula:

hydroxy-n-propyl )-5 ',5 -dimethylhydantoinyl-3 hexane. l,6-bis-l l-(B-hydroxy-n-butyl)-5',5'- dimethylhydantoinyl-3l-hexane. 2,2'-bis-[ HB- hydroxy-n-butyl )-5 .5-dimethylhydantoinyI-3 ]-diethyl ether, 2,2-bis-[l-(fi-hydroxy-fl phenyl ethyl)-5,5- dimethylhydantoinyl-3l-diethyl ether and l.l2-bis-[ l (B-hydroxy-B-phenyl ethyl)-5,S-dimethylhydantoinyl- 3l-dodecane.

A further suitable preferred subclass contains binuclear dihydroxy compounds of the following formula:

H ICII ings as in formula IX, and R1 R19, R 0 and R each independently represent a hydrogen atom or a lower alkyl radical having one to four carbon atoms; representative of this class of compounds are, e.g.:

I, l ,'-methylene-bis-[ 3-(B-hydroxyethyl)-5,5dimethyl- 5,6-dihydrouracil] and 1,1 -methylene bis-[3-(B- hydroxy-n-propyl)-5,5-dimethyl-5,6-dihydrouracil The new diacrylic acid esters of formula I are mostly 0, I. .d. Mi.

low-viscous liquids which, by virtue of their consis-- tency, can be easily processed.

The new diacrylic acid esters can be prevented from prematurely polymerising by the addition of the usual inhibitors, e.g.,'hydroquinone, phenothiazine, Cusalts, etc., and are distinguished by good stability in storage.

The diacrylic acid esters of formula I produced according to the invention are valuable resins which can be polymerised, either on their own or together with other polymerisable'monomers, as moulded shapes or as flat-shaped articles. The polymerisates obtained in this manner are distinguished by high flexural strength and transparency.

Suitable monomers which can be added to the new diacrylic acid esters of formula I are, in particular, compounds of the acrylic acid series, such as esters from acrylic acid or methacrylic acid and alcohols or phenols, e.g., methylacrylate, ethylacrylate,butylacrylate, dodecylacrylate, methylmethacrylate, acrylonitrile, methacrylonitrile, ethylene glycol diamethacrylate. It is moreover possible to use other reactive olefinic unsaturated monomers such as, e.g., styrene, divinylbenzene, vinyl acetate, etc..

For polymerisation or copolymerisation the usual free-radical-forming catalysts are preferably used;

mention may be made of hydrazine derivatives, e.g.', hydrazine hydrochloride, organometallic compounds such as tetraethyllead, as well as, in particular, aliphatic azo compounds such as a,a-azoisobutyrodinitrile and organic peroxides or peroxy salts such as, e.g., peroxyacetic acid, acetyl peroxide, chloroacetyl peroxide, trichloroacetyl peroxide, benzoyl peroxide, chlorobenzoyl peroxide, benzoylacetyl peroxide, propionyl peroxide, fluorochloropropionyl peroxide, lauryl peroxide, cumene hydroperoxide, cyclohexanone hydroperoxide, tert.-butyl hydroperoxide, di-tert.-butyl peroxide, ditert.-amyl peroxide, p-menthane hydroperoxide; also inorganic peroxide compounds such as sodium peroxide, alkali percarbonates, alkali persulphates or alkali pcrhorates, and especially hydrogen peroxide, which can advantageously replace the more expensive benzoyl peroxide. The addition thereof is governed, in a known manner, by the desired course of reaction, or by the desired properties of the polymerisate; advantageously, about 0.05 to per cent by weight of catalyst is used, calculated on the total weight of the polyacrylate or polyacrylate/monomer mixture, the total amount of catalyst being added either altogether at the commencement or in portions during the course of the polymerisation process.

In certain cases it is also possible to use cationic or anionic catalysts.

The new diacrylic acid esters produced according to the invention, or mixtures thereof with other polymerisable monomers, can be used for surface protection, in moulding materials, as casting resins, etc.

The present application hence relates also to curable mixtures which are suitable for the production of shaped articles including flat-shaped products, and which contain the diacrylic acid esters according to the invention, optionally together with other polymerisable monomers, and the polymerisation catalysts usually employed for polymerisation curing.

The polymerisable mixtures suitable for the production of coatings and moulding materials may additionally contain flexibilising agents, fillers and, preferably, pigments, e.g., titanium dioxide.

Where otherwise not stated, the term parts in the following examples denotes parts by weight, and percentages are expressed as per cent by weight; tempera tures are given in degrees Centigrade.

PRODUCTION EXAMPLES EXAMPLE 1 A mixture of 432.2 g of 1,3-bis-(B-hydroxyethyl)- 5,5-dimethylhydantoin (2 moles), 361.2 g of freshly distilled methacrylic acid (4.2 moles), 0.1 g of phenothiazine, 1,200 ml of benzene and 10 ml of concentrated sulphuric acid is heated, with vigorous stirring at 130C bath temperature, to obtain an internal temperature of 78C. At the same time an azeotropic circulation distillation process is initiated by means of which, as the benzene separated by cooling flows back, the water present in the reaction mixture is continuously removed from the reaction mixture and separated. An amount of 48 ml of water has been separated after 5 hours, and after 18 hours an amount of 70 ml of water (97.2 percent of theory).

The reaction mixture is then cooled to room temperature, and the benzene solution washed first with a 20 percent aqueous ammonia solution containing 5 percent ammonium sulphate, and then with a 5 percent aqueous ammonium sulphate solution. An addition is made to the organic phase of 3.5 g of hydroquinone (0.5 per cent by weight relative to the amount theoretically to be expected at the final point), and concentration by evaporation performed in a rotary evaporator at 5060C under a water-jet vacuum; drying is subsequently carried out at 55C under 02 Torr to obtain constant weight.

An amount of 621 g (88.2 percent of theory) of a pale yellow, clear, low-viscosity resin is obtained in this manner.

The titrimetrically determined content of methacrylate groups corresponds to percent of the theoretical content. These determinations of content are performed by the addition of dodecylmercaptan, and iodometrical back titration of the mercaptan excess. The unreacted methacrylic acid molecules are not affected by the method of determination so that this test procedure is also applicable for the assessment of the progress of the reaction. This titration is described by K. Muller in Zeitschrift fuer analytische Chemie 18, l35l 37 (1961 and by D. W. Beesing et al., in Analytical Chemistry 21, 1073 (1949).

The infrared spectrum (capillary absorption) shows, amongst other things, by the absorptions at 1,637 cm, 1,718 cm and 1,776 cm" that, in addition to the hydantoin and ester-carbonyl frequencies, the C=C absorption is present.

The elementary analysis shows: found: 57.9% C, 6.9% H and 7.8% N (calculated: 57.9% C, 6.9% H, 7.9% N).

The proton-magnetic resonance spectrum (60 Mc- HNMR, taken in deuterochloroform (CDCl against tetramethylsilane (TMS) as internal standard) shows by the following signals, amongst others, that the structure given below agrees:

G protons 6=1.38: singlet H3 A mixture of 216.1 g of l,3-bis-(l3'-hydroxyethy1)- 5,5-dimethylhydantoin 1 mole), 400 g of methacrylic acid methyl ester (4.0 moles), 0.08 g of phenothiazine and 5 ml of concentrated sulphuric acid is stirred in a glass apparatus provided with stirrer, internal thermometer and 40 cm packed column with fractionating head, at C heating bath temperature. In the course of the reaction the reaction temperature increases from 92 to 96C. The reflux ratio at the fractionating head is so adjusted that practically only methanol is initially distilled off, this stage taking about 5 hours. The excess methyl methacrylate is then distilled off within 3 hours.

The mixture is diluted with 200 ml of benzene, and washed as described in Example 1. An addition is made to the benzene phase of 1.5 g of hydroquinone and 'a trace of sodium nitrite, and the whole concentrated in the rotary evaporator at 50C under a water-jet vacuum; drying is performed at 50-55C-under 0.15 Torr. A clear yellow resin is obtained (269 g, corresponding to 77 percent of theory), the acrylate content of which, determined as described in Example 1, corresponds to 100 percent of theory.

The product is identical to the compound produced according to Example 1.

EXAMPLE 3 hours with an internal temperature of ll C. An

amount of 80 ml of ethanol is distilled off in this time (K,, 78C) (corresponding to 87 percent of theory). The subsequent procedure is as described in Example EXAMPLE 5 Corresponding to Example 2, 216.1 g of 1,3-bis-(B- hydroxyethyl)-5,5dimethylhydant0in (1 mole) are transesterified with 400.5 g of acrylic acid ethyl ester (4 moles) with the use of 0.08 g of phenothiazine and 5 ml of concentrated sulphuric acid. The procedure followed is exactly as described in Examples 2 and 3. and a bisacrylate compound is obtained. in good yield, which completely corresponds to the compound produced according to Example 4.

EXAMPLE 6 An amount of 151.2 g of acrylic-acid is esterified with 388 g of crude l,3-bis-(fi-hydroxy-y-n-butoxympropyl)-5,5-dimethylhydantoin in 900 ml of benzene with the aid of 5 ml of concentrated sulphuric acid and 0.08 g of phenothiazine, the procedure being as given in Example 4. By carrying out the reaction and processing as in Example 4 a product is obtained (447 g, corresponding to 90.2 percent of theory) of which the purity, relative to the acrylic ester content, is 72 percent of theory. The bisacrylate compound corresponds es sentially to the following structure:

' produced according to Example 1.

EXAMPLE 4 An amount of 216.1 g of l,3-bis-(B-hydroxyethyl)- 5 ,S-dimethylhydantoin (1 mole) and 151.2 g of acrylic acid is esterified with the aid of concentrated sulphuric acid in 600 ml of benzene, with the addition of 0.08 g of phenothiazine, as described more precisely in Example 1. Processing and stabilisation are likewise according to Example 1. An amount of 290 g of a pale-yellow liquid (89.4 percent of theory) is obtained, the purity of which, relative to the content of acrylate groups, is 83 percent of theory. The proton-magnetic resonance spectrum (60 Mc-HNMR, in CDCl against TMS) shows, by the presence of the following signals, that essentially the below given structure is in agreement:

6:1.42: singlet. CH3

Following the proceduregiven in Example 4, 123 g of l,3-bis-(B-hydroxy-npropyl)-5,5-dimethyl-6-isopropyl-5,6-dihydrouracil (0.4lmole) are reacted with 62 g of acrylic acid (0.861 mole) in 300 ml of benzene with the use of 3 ml of concentrated sulphuric acid and 0.04 g of phenothiazine.

Processing and stabilisation are carried out as described in Example 1. An amount of 128 g of a yellowish and highly viscous resin (73 percent of theory) is obtained, of which the content of acrylate groups corresponds to 62 percent of the theoretical content. The bisacrylate compound corresponds essentially to the following structure:

According to the procedure given in Example 2, an amount of 244 g of 1,3-bis-(B-hydroxy-n-propyl)-5,5- dimethylhydantoin 1 mole) is esterified with 457 g of methyl methacrylate (4 moles), an addition being made of 0.08 g of phenothiazine and 5 ml of concentrated Analogously to Example 4, an amount of 384.5 g of 1,1-methylene-bis-[3-(B-hydroxy-n-propyl)-5,5-

EXAMPLE 1 1 Analogously to the procedure described in Example 1, an amount of 1 18 g of 2,2bis-[ l-(fihydroxypropyl )-5,5-dimethyl-hydantoinyl-3 ]-diethyl ether (0.261 mole) is esterified with 39.5 g of acrylic acid (0.548 mole) in 400 ml of benzene, the esterification reaction being catalysed with 18 g of the ion exchange used in Example 10, and the formed diacrylic acid diester inhibited with 0.03 g of phenothiazine 0.1 g of triphenyl phosphite. The procedure is carried out as given in Example 10 to obtain 140.2 g (95.7 percent of theory) of a clear light-ochre-coloured resin. The new diacrylic acid diester corresponds essentially to the following structure:

of acrylic acid (2.1 moles) in 1300 ml of benzene with gof p-toluenesulphonic acid as catalyst under the inhibiting action of 0.08 g of phenothiazine.

Processing and purification are carried out as described in Example 1.

An amount of418.3 g of a highly viscous, clear, lightochre-coloured liquid is obtained of which the content of acrylic ester double bonds corresponds to 86.5 percent of theory. The new diacrylic acid ester corresponds essentially to the following structure:

In a similar manner to that described in Example 1, an amount of 135.3 g of 1,1-methylene-bis-[3-(B- hydroxy-n-propyl)-5,5-dimethyl-5,6-dihydrouracil] (0.328 mole) is esterified with 59.5 g of methacrylic acid in 400 ml of benzene.

The catalyst used consists of 20 g of an acid ion exchanger (exchange capacity: 4.5 m val/g); and the stabiliser of 0.03 g of phenothiazine and 0.01 g of triphenylphosphite. After the reaction is complated, the ion exchange resin is removed by filtration, and processing carried out according to Example 1. An amount of 1 14 g of a clear, colourless to slightly yellowish viscous resin is obtained of which the content of acrylate double bonds is 69.5 percent of theory. The substance corresponds essentially to the formula:

By means of the procedure described in Example 1, the following mixture is reacted in a glass reaction flask:

366.5 g of 1,3-bis-(B-hydroxy-n-propyl)-5,5-

dimethylhydantoin 1.5 moles),

433 g of acrylic acid (3 moles),

900 ml of toluene,

0.3 g of phenothiazine,

1.5 g of triphenylphosphite.

An amount of 25 ml of 50 percent sulphuric acid is used as catalyst, the addition being made dropwise by degrees.

The above mixture is stirred at 168C bath temperature, the internal temperature rising in the course of the reaction from 109 to 1 13C. The amount of water theoretically to be expected has been separated after about 5 hours. The reaction mixture is then cooled to 25C and processed. The solution, filtered until clear, is washed twice with 500 ml of water containing 10 percent of ammonia and 5 percent of ammonium sulphate. After separation of the aqueous phase, the following inhibitor system of the organic phase is added: 1.7 g of hydroquinone; 0.006 g of pyrocatechol; 0.1 g of 8 percent copper naphthenate and 0.14 g of sodium nitrite in 0.4 m1 of water. The organic phase is subsequently concentrated at 55C in a rotary evaporator under a water-jet vacuum; and drying to constant weight is afterwards carried out within 2 hours under 0.3 Torr at 55C. An amount of 468.3 g (88.6 percent of theory) of a pale yellow, low viscous liquid is obtained containing 5.21 acrylate equivalents/kg, which corresponds to a content of acrylate double bonds of 91.8 percent of theory. The new diacrylate corresponds essentially to the following structure.

gen or alkyl of one to four carbons, m and n are each t) HaC-CC=O a whole number having a value of l to 30. 1IzC=C1I0-O CH CH 1' \1 l c a g 2. Diacrylic acid ester according to claim 1 of the for- CH; fi c rn mula:

' 0 mt cm 0 0 e 0 APPLICATION EXAMPLES ll 1 1 l5 l0 HzC=CCOC1Iz-CH;--N N cn2 ctn-o 4' cu, EXAMPLE I H1 1 c 111 An amount of 100 g of the heterocyclic bismethacry- 0 late produced according to Example 1 is mixed with 0.8 g of lauryl peroxide at 60C, and the mixture poured into an aluminium mould. Polymerisation is carried out 1 5 .D" 1' 'd :t z d' t 1"11 lolthl'm for 4 hours at 70C, 4 hours at 85C, 4 hours at 100C 3 may 1C dc] es er lcwr mg L L mula: and 24 hours at 150C.

A pale yellow, clear-transparent moulded shape is obtained having the following properties:

t r? a.

11: rr-c-o on cn- .1 1 :9 flexural strength according to VSM 10.0-11.5 kp/mnfi C C 7 a N\ /N CH2 C h C H uh 77103; o deflection according to VSM 77103: 4.3 4.5 mm. ll dimensional stability at elevated I 0 temperatures according to Martens.

DIN 53 45s; 57C, I

' t h'l' d llf s iz a I y mm mg m 73 g 4. Diacrylic acid ester according to clatm 1 of the forcold water absorption (4 days/20C): 1.171. l

H3C 3am (I) 0 mo=cH 50-cH-cm N /1 ICHz-CHOC -CH=CH2 In c rn v II3C-CH;CH;CH;-0 o 0CIIz-CHz-CH CH EXAMPLE [I 5. Diacrylic acid ester according to claim 1 of the for mula: An amount of 100 g of the blsmethacrylate produced according to Example -2 is mixed with 1.2 g of lauryl 6 peroxide at 60C; the mixture is then cured for 4 hours CH3 c 113 0 cm at 70C, 4 hours at 85C, 4 hours at 100C, and 24 m0: c-o cH cm- N-CHI1 CH-O =CI-t, hours at 120C. A flexible moulded shape 15 obtained 6 having a deflection value according to VSM 77103 of II 18.6 to over 20 mm.

We claim: 6. Diacrylic acid ester according to claim 1 of the for- 1. A diacrvlic acid ester of the formula l Rs R4(|J-C=0 O r HzC=C-l J 0-CHCH N |3H |0H 0 e=crr H I ll 1L0 I la /m \C/ \R3 R2 )1- i [30 ll fi H30o-( :=.0 o

. H:C=CHCOCHCHz-N N-C Hz-CH-O()CH=CH1 wherein R and R are independently hydrogen or 1136 methyl, R 18 hydrogen, lower alkyl or lower alkyl interl rupted by oxygen, R and R are independently hydro- 

1. A DIACRYLACIC ACID ESTER OF THE FORMULA
 2. Diacrylic acid ester according to claim 1 of the formula:
 3. Diacrylic acid ester according to claim 1 of the formula:
 4. Diacrylic acid ester according to claim 1 of the formula:
 5. Diacrylic acid ester according to claim 1 of the formula:
 6. Diacrylic acid ester according to claim 1 of the formula:
 30. 